It is not certain whether the blade geometry of videolaryngoscopes, either a hyperangulated or Macintosh shape, affects glottic view, success rate and/or tracheal intubation time in patients with expected difficult airways. We hypothesised that using a hyperangulated videolaryngoscope blade would visualise a higher percentage of glottic opening compared with a Macintosh videolaryngoscope blade in patients with expected difficult airways.

中文翻译：

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超角度与 Macintosh 视频喉镜在预计患有困难气道管理的成人中的应用：一项随机对照试验


目前尚不清楚视频喉镜的刀片几何形状（无论是超角度还是麦金塔形状）是否会影响预期困难气道患者的声门视野、成功率和/或气管插管时间。我们假设，与 Macintosh 视频喉镜刀片相比，对于预期患有困难气道的患者，使用超角度视频喉镜刀片可以看到更高比例的声门开口。